I love to take pictures. I have tried lots of different kinds of camera's, but I still have not found one that is just perfect for me. I figured out though, that with a larger Sd card that could hold lots more pictures for me makes whatever camera I had way more fun to use. I first got a 2 gig SdDcard and that was nice but as I looked I found a 4 gig then later an 8 gig! I was so excited. I go on trips alot and hate to carry around lots of smalmer gigabyte cards, I bought just two 8 gig Memory cards and I was fine for my whole trip. This certain SD card is 8 gig, like I said, and it holds a ton. It is an SD which means it will only fit into certain carmera's, it is fully compliant with all SD compliant devices, it will support all SDHC compatible devices, it has a class 2 speed performance rating, and it is super small and easy to pack around. There are small cases you can buy for SD cards so they wont get ruined. Most SD cards have lock on them, which means that when you put them into a camer you can't take pictures or delete pictures from that SD card, there is a tiny switch on the side that says lock.